Remove unused imports, add missing Copy derives, add missing features.

src/main.rs

@@ -1,6 +1,8 @@
 #![feature(box_syntax)]
 #![feature(plugin)]
 
+#![feature(collections, core, io, os, path, rustc_private, std_misc)]
+
 #[plugin]
 #[no_link]
 

src/minecraft/block_state.rs

@@ -9,7 +9,6 @@ use std::num::UnsignedInt;
 use array::*;
 use chunk::{BiomeId, BlockState, Chunk};
 use cube;
-use device::draw::CommandBuffer;
 use gfx::Device;
 use minecraft::biome::Biomes;
 use minecraft::data::BLOCK_STATES;
@@ -28,14 +27,14 @@ pub struct BlockStates {
     texture: Texture
 }
 
-#[derive(PartialEq, Eq, Clone)]
+#[derive(PartialEq, Eq, Clone, Copy)]
 pub enum RandomOffset {
     None,
     XZ,
     XYZ
 }
 
-#[derive(PartialEq, Eq, Clone)]
+#[derive(PartialEq, Eq, Clone, Copy)]
 pub enum Dir {
     Down,
     Up,
@@ -69,7 +68,7 @@ impl Dir {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub enum PolymorphDecision {
     // Stop and use this block state ID for the model.
     PickBlockState(u16),

src/minecraft/nbt.rs

@@ -6,7 +6,6 @@ use std::string::ToString;
 
 use flate::{ inflate_bytes, inflate_bytes_zlib };
 use serialize;
-use serialize::Decodable;
 use serialize::hex::ToHex;
 
 use self::Nbt::*;

src/shader.rs

@@ -2,7 +2,6 @@ use device;
 use device::draw::CommandBuffer;
 use gfx;
 use gfx::{ Device, DeviceHelper, ToSlice };
-use gfx::render;
 use vecmath::Matrix4;
 
 static VERTEX: gfx::ShaderSource<'static> = shaders! {